Band-saw-mill attachment



Patented Aug.v 20, 1895.

N SHAW. BAND SAW MILL ATTAGHMBNT.

(No Model.)

No. 544,694.v

`bviiljzssaes I *I 0142/10@ )gy eArgQeys.

. provide a device, the nature of which will be UNITED STATES".

PATENT I EEICE.

NOAH SHAW, OFEAU CLAIRE, WISCONSIN.

BAN o-sAw-M LL ATT-ACH MENT.v

SPECIFICATION forming part of Letters Patent No. 544,694, dated August20,1895.l

' Application fina April so, 1895. l

consin, have invented a new and useful Band- SaW-Mill Attachment, ofwhich V the following` is a specification; y

This invention relates to an improvement in attachmentsfor band-sawmills..

The object of the present invention is to hereinafter described, havingfor its purpose to prevent the fine dust, duc., from entering the centerof the lower band-wheel, dueto the suc'tionvcaused by the rapidrevolution of lsaid band-wheel. p l 1 To this end'the invention consistsin certain novel features and details of'construotion and arrangement ofparts, as hereinafter fully ythrough the opposite walls or sides of thehousingor pit in which said wheel is located; Fig. 3 is a similar viewshowing the application of my improvement when used in'connection with aWheel having an imperforate we b.

Similar numerals of reference designate corresponding parts in thefigures ofthe drawings.

This invention contemplates the use, in connection with the lowerband-wheel of a bandsaw mill, of a disk or circular plate designated bythe referencenumera1 l. This disk or plate is made-about vthree inchesless indiameter than the inside diameter of the rim of the lowerband-wheel, indicated at 2, so as to leave` an annular space 3 ybetweenthe disk and wheel-rim. The outer edge or periphery1 of the disk l. iscurved inward toward the wheel in such -manner as to bring said edgewithin the side edge of the wheel-rim. Where v. the band-wheel has armsor spokes 4 the disk l is provided with a central perforation 5 andfitted tightly around the band-wheel shaft indicated at 6.

is to prevent thefine dust produced by the cut of the band-sawfromentering the central The object of this-construction- Serin No.547.690. on maui part of the wheel, due to the suction caused by therapid revolutionofsaid wheel. When the dust is drawn in at the center ofthewheel,

where no guard is provided, said dust is carried around with the saw-andwheel, and, as

a result, the outer face of the wheel becomes coated with Asuch `nedust, whichcauses a great deal of trouble, necessitating the fre? quentstoppage of the mill in -orderto clean the face of the wheel. Besidesthis a quantity -of the dust follows the saw in its upward-passage tothe upper band-,wheel and is vthrown thereby and scattered upon theSawyer, grad ually covering the timber and the surface ofthe upperportionvof the frame of the mill .with a Substance highly inflammableafter it becomes thoroughly dry, which happens in about three weeks.'The disk l, being stationary, may be secured to theusual bearing-han ger7 ,or other convenient point.v

As band-saw mills are usually'constructedv the lower band-Wheel isincased on all sides andthe dust is conveyed therefrom by suctionthrough suitable carrier-pipes. The inside partition of the Wheel-pit,as indicated at S, is beneath the bed of the mill and is usually locatedin close proximity to the band-wheel,v

an aperture in the inner partition or wall 8 of.

the casing orpitfadjacent to the center of l said wheel'. The air thusadmitted can pass through between thespokes of said wheel to theopposite side thereof andthence out' through the'annularspace referredto.

In Fig.,3 I have shown the manner in which thel disk is applied to awheel having animperforate web in lieu of the spokes of Fig. 2.

4In this case the disk is provided withan aperture adjacent to andSurrounding the shaft of the band-wheel, said aperture being of asufficient size to admit air from. that side of the wheel." l0designates afresh-air spout which issecured to the outer` face of thestationary disk l and connected therewith in suchmanlos ner as toprevent the admission of dust" massi through the aperture in said disk.The freshair spout extends upwardly above the cover of the pitor housingin which the Wheel revolves and is open at its top to allow the air topass down to the aperture in the disk and thence into the wheel, fromwhich it escapes through the annular opening or space 3 between saiddisk and the rim of the wheel.

The device above described is very simple and inexpensive inconstruction, but will be found very efficient in practice, effecting,as it does, a great saving in the time of the sawlyer, for the reasonthatv the mill requires less attention and cleaning-than under the usualarrangement. By supplying air that is free from dust tothe centerofthewheel-the fine dust which enters the pit o r housing is not attractedto the wheel and eithertalls to the bottom of the pit or is immediatelycarried off by means of the usual devices for this purpose.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is` 1.` In a band saw mill, thecombinationpwith the band wheel thereof, of a disk disposed at one sideof said wheel andhaving aldiameter which is slightly less than theinternal diameter of the wheel rim` and having its edge or peripherydeflected inward, substantially in the manner and for the purposedescribed. 2. In a band saw mill, the combination with the lower bandwheel thereof, and the usual pit or housing in which the same ismounted, of a disk arranged at one side of the wheel and of smallerdiameter than the internal diameter of the wheel rim, said disk alsohaving a central aperture adjacent to and surrounding the wheel shaft,and an air spout arranged outside of said disk and communicating withthe central aperture therein, substantially as and for the purposespecified.

. 3. l Ina band saw mill, the combination with the band wheel thereof,of a circular plate ordisk having a diameter .less than the internaldiameter lof thewheel rim` and fitted on one side ofthewheel in'suohmanner as to leavean annular space between the periphery of said plateor disk and` the wheel rim, for the purpose described."

'In testimony'that I claim the foregoing as y my own I have heretoaliixed my signature in the presence ot' two witnesses.

NOAH SHAW. Witnesses:

" L. A. SHAW,

WJ W. JACKSON,

